package servlet;

import pojo.User;
import service.UserService;
import service.impl.UserServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

//注解
@WebServlet(urlPatterns = "/user")
public class UserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //TODO
        UserService userService = new UserServiceImpl();
        req.setCharacterEncoding("UTF-8");
        String action = req.getParameter("action");
        //判断action来区分哪种操作
        if ("list".equals(action)){
            String name = req.getParameter("name");
            String pass = req.getParameter("pass");
            User condition = new User(name, pass);
        List<User> users = userService.findAll(condition);
        //把数据放在请求域中
        req.setAttribute("users",users);
        req.setAttribute("condition",condition);
        //
        req.getRequestDispatcher("/list.jsp").forward(req,resp);
    }else if("delete".equals(action)) {
            //TODO
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);
            int result = userService.deleteUserById(id);
            if (result > 0) {
                resp.sendRedirect("user?action=list");
            } else {

            }
        }else if("add".equals(action)){
                String name = req.getParameter("name");
                String pass = req.getParameter("pass");
                int result = userService.addUser(new User(name, pass));
                if(result>0){
                    resp.sendRedirect("user?action=list");
                }else{
                }
            }
            else if("toupdate".equals(action)){
            String sid= req.getParameter("id");
            int id=Integer.parseInt(sid);

            User user = userService.findUserById(id);
            //把数据放在请求域中
            req.setAttribute("user",user);
            //
            req.getRequestDispatcher("/updateUser.jsp").forward(req,resp);
    }
        else if("update".equals(action)){
            String sid = req.getParameter("id");
            int id = Integer.parseInt(sid);

            String name = req.getParameter("name");
            String pass = req.getParameter("pass");

            int result = userService.updateUser(new User(id,name,pass));
            if (result > 0) {
                // 重定向
                resp.sendRedirect("user?action=list");
            } else {
                System.out.println("error");
            }
        }
    }
    }

